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The electron density on the surface of a circular disc of radius 20 m is given as ne = 300ρ cos2 φ electrons/meter2. Determine the number of electrons residing on the surface of the disc. What is the total charge on the disc?
Two point charges lie on the x axis. A charge of 6.2uC is at the origin, and a charge of -9.4uC is at x=10.0cm. What is the net electric field at x=+4.0cm
A weather vane initially at rest has a moment of inertia of 0.122 kg · m2 about its axis of rotation, Find the angular velocity of the weather vane just after it is struck
A bar magnet with its center at the origin has a magnetic dipole moment equal to 6.50 J/T, directed along the positive z axis. Find the strength of the magnetic field created by this bar
An airplane pilot tries to fly directly east with a velocity of 800.0 km/h. what is the relative velocity of the airplane to the surface of the earth
In the process represented in the figure, 2.4 moles of an ideal monatomic gas start at state a, with pressure 1 atm (1.01*10^5 N/m^2), Find the net work done by the gas in one cycle
A student holds two lead weights, each of mass 14 kg. When the students' arms are extended horizontally, the lead weights are 1 m from the axis of rotation, Calculate the final angular speed of the system
Consider a large chemical storage tank that is 100 ft in diameter and 25 feet tall. What is the force exerted by the fluid on the base of the tank
A vertebra is subjected to a shearing force of 535 N. The shear modulus for vertebrae is 8.00 x 1010 N/m2. Find the shear deformation
A cat jumps off a piano that is 1.3 meters high. How far from the edge of the piano does the cat strikes the floor
A weather balloon has a volume 1.2 m^3 at sea level where the pressure is 101 kPa and the temperature is 20 C. When the balloon rises to an altitude of 11 km, the pressure is down to 50.5 kPa and the temperature is about -55 C. What is the volume of ..
Blood pressure is related to the force of blood pushing against the walls of your arteries as your heart pumps. What is the minimum length of a vertical tube
suppose you adjust your garden hose nozzle for a hard stream of water. you point the nozzle vertically upward at a
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